(CNN)If "diplomatic dance" were an event at the Winter Olympics, Kim Jong Un's younger sister would be favored to win gold.

With a smile, a handshake and a warm message in South Korea's presidential guest book, Kim Yo Jong has struck a chord with the public just one day into the PyeongChang Games.

Pyongyang - Seoul - People - Hearts - Future

"I hope Pyongyang and Seoul get closer in our people's hearts and move forward the future of prosperous unification," she said in her guest book message, referring to the capitals of North and South Korea.

Seen by some as her brother's answer to American first daughter Ivanka Trump, Kim, 30, is not only a powerful member of Kim Jong Un's kitchen cabinet but also a foil to the perception of North Korea as antiquated and militaristic. In Pyeongchang, her presence is a major story line for reporters and the buzz on the street, with some in South Korea curious and accepting, while others are skeptical, if not downright cynical.

North - Korea - Olympics - Yoon - Jun-young

"Her being here is not that bad, but I feel North Korea has shown up to the Olympics without paying," said Yoon Jun-young, 23, indicating that the nation hasn't made any political concessions to mirror its participation on the international sporting stage.

Kate Yoo, 21, who like Yoon spoke to CNN during Saturday's hockey match between Switzerland and the unified Korean team, said she doesn't think it's "the best thing to have her here, although maybe part of having one of the Kim dynasty over is like a safeguard, then they won't attack."

Week - World - Kim - Yo - Jong

It wasn't until this week that the world learned Kim Yo Jong would join her nation's Olympic delegation. Just a few days later, she is the face of North Korea at PyeongChang.

The first member of the North's ruling dynasty to visit the South since the Korean War ended in an armistice...